Really depends on what kind of shots we're talking about?
Set up portraits? Candid street stuff?
I'm guessing you're in the southside from your Flickr pictures, there's a few places for the standard portrait shots - Pollok Park (especially the courtyard and around the house), Holmwood house in Cathcart, Queens Park (Along the row of trees leading to the Victoria RD entrance). If you're looking fo more grimey, urban (Sorry for the expression!) images you could take a drive down to Cardross for the day, there are loads of empty and decaying buildings along Tradestone, Pollokshaws, Arden, etc, and the tunnels under the M8 at Braehead with their graffiti.
If you're doing candid shots, I think the GOMA, outside the Buchanan Galleries and generally anywhere in the West End might be the better options.